This is a real problem, devs get too many subs and they don't want that to end instead of making something new. If I like something, I'll sub for about $30 worth. After that, I'll acquired it by other means.
I apologize to the honorable authors. This is just an assumption based on some observations.
I hope it doesn't apply to the developers of our favorite games.
The following occurred to me: Maybe there's some other scheme at work on Patreon:
Or someone creates a startup and then sells it, along with the account, to another person who continues the project, collecting donations from subscribers. And the original developer publishes a new game on the new account.
Or a more probable variant: the project owner attracts third-party developers at the initial stage of development, and then either tries to continue development with his own modest forces, or continues cooperation with them, but they have other, more important projects for them.
But, I'll say it again: it's just an assumption, conspiracy (if it's allowed).
If you vivisect the game (sorry, no one canceled decompilation), you can see that the author is really engaged in the development of the game, improving its core. And I understand many of the problems that arise in such cases. So, I advise everyone to just be patient some more. Wait, there will be a sequel.